A pump body assembly, compressor and refrigeration apparatus
CN224693559UActive Publication Date: 2026-08-28SHANGHAI HITACHI ELECTRICAL APPLIANCES CO LTD
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Patent Information
- Application Number
- CN202521760317.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-19
- Publication Date
- 2026-08-28
- Estimated Expiration
- 2035-08-19
AI Technical Summary
Technical Problem
[0003]目前，两级增焓压缩机结构主体都包括第一级压缩气缸和第二级压缩气缸，而第一级和第二级的曲轴偏心部普遍还是采用单级压缩机的偏心部的设计来对应，由于两级偏心部的摩擦力较大，容易使曲轴受力不均而发生弯曲，造成曲轴和活塞之间的磨耗增大，造成活塞倾斜、卡死，导致压缩机咬死
Benefits of technology
[0018]本实用新型提供了一种泵体组件、压缩机及制冷设备。泵体组件包括：第一气缸、第二气缸、曲轴、第一活塞和第二活塞，曲轴间隔设置有第一偏心部和第二偏心部，第一活塞套设于第一偏心部的外周，第二活塞套设于第二偏心部的外周，第一气缸内设有第一腔体，第二气缸内设有第二腔体，第一活塞转动设置于第一腔体内，第二活塞转动设置于第二腔体内，第二气缸用于压缩第一气缸排出的气体，第一偏心部与第一活塞沿曲轴的轴向的接触面的高度为H1，第一气缸沿曲轴的轴向的高度为h1，其中，H1/h1＝W1，第二偏心部与第二活塞沿曲轴的轴向的接触面的高度为H2，第二气缸沿曲轴的轴向的高度为h2，其中，H2/h2＝W2，W2≥W1。相较于现有技术，该泵体组件通过控制第一偏心部与第一活塞的接触高度及第二偏心部与第二活塞的接触高度之间的比例关系来平衡曲轴轴受和应力，进而减小曲轴和活塞之间的摩擦功率，避免活塞倾斜、卡死，防止曲轴受力不均发生弯曲，保证压缩机的稳定性。
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Abstract
The utility model relates to a kind of pump body assembly, compressor and refrigeration equipment.It includes: first cylinder, second cylinder, crankshaft, first piston and second piston.Crankshaft is spaced apart with first eccentric part and second eccentric part, first piston is sleeved in the outer periphery of first eccentric part, second piston is sleeved in the outer periphery of second eccentric part, along the axial direction of crankshaft, the height of the contact surface of first eccentric part and first piston is H1, the height of first cylinder is h1, wherein, H1 / h1=W1, the height of the contact surface of second eccentric part and second piston is H2, the height of second cylinder is h2, wherein, H2 / h2=W2, W2≥W1.The pump body assembly balances crankshaft shaft and stress by controlling the proportional relationship between the contact height of crankshaft eccentric part and piston in two cylinders, to reduce the friction power between crankshaft and piston, avoid piston inclination, jam, prevent uneven stress of crankshaft from bending, ensure the stability of compressor.
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